احصاء 110 : شرح + استفسارات + اسئلة

[moliana]

to qualify for a police academy . candidates must score in the top 10% on a general abilities test. the test has a mean of 200 and a standard deviation of 20 . find the lower possible score to qualify .Assume the test scores are normally distributed

ممكن اححد يشرححو >_< '